Elevating mechanism



(No Model.)

.0.0.BEATTY-. ELEVATING MECHANISM.

Patented June 14, 1898.

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lllllllllllll I lhvrrnn STATES PATENT Urrrcn.

ORIN o. BEATTY, or CLEVELAND, oI-no.

ELEVATING MECHANISM.

SPECIFICATION forming part of LettersPatent No. 605,467, dated June 14, 1898.

Application filed September 27, 1897. Serial No. 653,089- (N'o model.)

To all whom it may concern:

Be it known that I, ORIN O. BEATTY, a citizen of the United States, and a resident of Cleveland, county of Cuyahoga, and State of Ohio, have invented a new and useful 11nprovement in Elevating Mechanisms, of which the following isa specification, the principle of the invention being herein explained and the best mode in which I have contemplated applying that principle, so as to distinguish it from other inventions. I

The annexed drawings and the following description set forth in detail certain mechanism embodying the invention, such disclosed means constituting but one of various mechanical forms in which the principle of the invention maybe used.

In the said annexed drawings, Figure I represents a vertical central cross-sectional view of an elevator-shaft, showing my improved mechanism in front elevation therein. Fig. II represents a front elevation of a portion of the mechanism, illustrating the manner of supporting and elevating the elevator-car and bracing the elevating-screw. Fig. III represents a side elevation of the detail shown in Fig. II. Fig. IV represents a top plan of the bracing means, and Fig. V is a detail crosssectional view of the elevating-screw.

The elevator-carA is provided at its top with a transverse supporting-beam A, which extends'some distance beyond each side of the car and surrounds or receives, by means of a suitable bore or slot, the elevating-screws B, which are two in number and extend longitudinally in and vertically throughout the length of the shaft, its extremities being rig idly secured. Nuts 0 mesh with said screws, and each is provided at its upper surface with a ball-raceway, which receives balls 0. Surrounding each screw B and provided witha suitable bore and secured to the lower side of said beam A is a second ball-raceway, which rests upon the upper portion of the balls 0. It is thus seen that the elevator-car is supported by the two nuts 0, the rotation of which would raise or lower the car, according to the direction of rotation and trend of the screw. To effect such raising or lowering, I provide each nut with a bevel-gear c, Fig." II, which meshes with a second gear 0 secured to a shaft 0, which is rotated by a suitable reversible motor 0 Where long screws are required for high buildings, it is necessary to brace such screws at suitable intervals between theextremitie s thereof in order to prevent buckling or collapse. For this purpose I provide at such intervals pairs of bracing-levers D, Figs. III and IV, fulcruined to the side of theshaft,

their free extremities resting againstoppositesides of the screw. Each such lever is provided with a roller d, the peripheries of which .when the levers are in a bracing position are of a length requiring the joining of several sections to make up the'whole'. The end of each section is tapped out and provided with a stud b, by means of which the joint is made.

At each laterally-supported portion of the screw there are formed two diametrically-disposed keyways b, Fig. IV, milled parallel to the axis of the screw, andinto which fit two keys d, one secured to each inner or contact face of the levers D, whereby the latter secure a firm seat upon thescrew and form resistance against torsional stress, which may be present in the said screw.

Springs Dnnay be interposed between the levers D and their supports D to augment the resisting function of the said levers.

I prefer also to form the contact-faces of the levers with interior threads to mesh with the thread of the screws. A suitable governor of any desired construction may be provided for regulating the speed of the motor and ear.

Other modes of applying the principle of my invention may be employed instead of the one explained, change being made as regards the mechanism herein disclosed, provided the means covered by any one of the following claims be employed. I

v I therefore particularly point out and distinctly claim as my invention- 1. In elevating mechanism, the combination of an elevator-car, an elevator-shaft, a screw extending longitudinally in said shaft,

a nut secured to said car and meshing with,

said screw, means for rotating said nut, and means for bracing said screw between its extremities, substantially as set forth.-

2. In elevating mechanism, the combination of an elevator-car, an elevator-shaft, a screw extending longitudinally in said shaft, a nut secured to said car and meshing with said screw, means for rotating said nut, means for bracing said screw between its extremities and means. for removing said bracing means on the passage at the braced point, of the said nut, substantially as set forth.

3. In elevating mechanism, the combination of an elevator-car, an elevator-shaft, a screw extendinglongitudinally in said shaft, a nut secured to said car and meshing with said .screw, means for rotating said nut, separable means for bracing said screw at points intermediate of the extremities thereof, and means for separating said bracing means thereby permitting the passage on said screw of sai nut, substantially as set forth.

.4. In elevating mechanism, the combination of an elevator-car, an elevator-shaft, a screw extending longitudinally in said shaft, a nut secured to said car and meshing with said screw, means for rotating said nut, pairs of bracing-levers located at intervals along said screw, a separator secured to the car on each side of said nut, whereby said levers are separated on the approach of said nut, substantially as set forth.

5. In elevating mechanism, the combination of an elevator-car, an elevator-shaft, a screw extending longitudinally in said shaft, a nut secured to said car and meshing with said screw, means for rotating said nut, pairs of bracing-levers located at intervals along said screw and journaled to the side of the shaft, a double-wedge separator secured to the car, one wedge portion located on each side of the nut, said wedges adapted to separate the bracing-levers on approach of the nut, substantially as set forth.

6. In elevating mechanism, the combination of an elevator-car, an elevator-shaft, a screw extending longitudinally in said shaft, a nut secured to said car and meshing with said screw, means for rotating said nut, pairs of bracing-levers, each provided with a roller, located at intervals along said screw and j ournaled to the side of the shaft, a double-wedge separator secured to said car, one wedge portion located on each side of the nut, said wedges adapted to engage said rollers and separate said levers on approach of the nut, substantially as set forth.

Signed by me this 24th day of September, 1897.

O. C. BEATTY.

Attest:

D. T. DAVIES, A. E. MERKEL. 

